.NET Development for Medical Device Manufacturers

QServices cut manual portfolio management effort by 40% on a recent .NET financial platform. .NET development for medical device manufacturers is validated software engineering that connects QMS, ERP, and post-market surveillance under FDA 21 CFR Part 11 and ISO 13485. Most projects run 8 to 24 weeks.

Why medical device manufacturers need custom .NET development right now

The FDA issued more than 4,000 Form 483 observations in FY2023, with data integrity failures as the most-cited category, per FDA inspection records. Most trace back to disconnected data systems, not deliberate misconduct. Your QMS lives in MasterControl or Veeva Vault. Your ERP runs on SAP or Oracle EBS. Post-market surveillance data sits across multiple spreadsheets. None connect without manual exports.

EU MDR enforcement since 2021 added post-market clinical follow-up (PMCF) obligations requiring structured data collection and formal reporting schedules. Companies managing this manually spend 60 to 90 days assembling reports that an integrated system produces in hours. ISO 13485 auditors are asking harder questions about traceability between design changes and risk management outputs.

A failed FDA inspection costs more than the warning letter. Remediation plans, third-party audits, and months of engineering time proving data integrity all add up. This is exactly the problem our industry solutions team is built to prevent before it starts.

What we build for medical device clients

Every system QServices builds for this industry must do three things: pass validation, integrate cleanly with existing infrastructure, and remain maintainable by your internal team after handoff. Here is what that looks like in practice:

• Validated document control APIs (.NET 8 and ASP.NET Core): Electronic records and signatures compliant with FDA 21 CFR Part 11. Replaces spreadsheet-based approval workflows with a fully auditable trail. Our Human-in-the-Loop (HITL) governance places a human approver at every high-stakes sign-off before any record is committed. Typical result: 40 to 60% shorter document cycle times.
• ERP-to-QMS integration middleware: Connects SAP or Oracle EBS to MasterControl or Veeva Vault using documented REST or SOAP contracts. Eliminates manual re-entry and the transcription errors that delay CAPA closure. Each integration is scoped as a separate deliverable with its own IQ/OQ validation protocol.
• Post-market surveillance dashboards: Consolidates complaint data, MDR submissions, and field corrective actions into a single .NET-backed reporting layer. Configurable by product line, market, and regulatory regime (FDA vs. EU MDR). PMCF report generation drops from weeks to hours.
• Regulatory submission data pipelines: Structured exports for eCTD and 510(k) submissions, validated against FDA guidance documents. Each pipeline includes a HITL checkpoint where a regulatory affairs specialist reviews the extracted dataset before it enters the submission package.
• Cloud-native deployment on Azure: Azure App Service with SQL Server, deployed to your Azure tenant so your data stays under your control. Meets ISO 13485 software validation requirements and FDA General Principles of Software Validation guidance.

How a .NET development engagement actually works

Here is the week-by-week structure for a typical medical device .NET project. Single-system integrations run 8 to 12 weeks. Multi-system platforms with full validation packages run 16 to 24 weeks.

1. Weeks 1-2: Discovery and requirements lock. We interview your VP of Quality, Head of Regulatory, and IT Director. We document current data flows, regulatory constraints (21 CFR Part 11, ISO 13485, EU MDR), and integration touchpoints. Output: a functional requirements specification (FRS) and a validation master plan (VMP). No code is written until both are signed off.
2. Weeks 3-4: Architecture and design review (HITL checkpoint). We present the technical architecture, database schema, and API contracts. This is a hard stop. Development does not begin until your IT Director and Head of Regulatory approve the design. Catching issues here costs a fraction of finding them in testing.
3. Weeks 5-12: Development sprints. Two-week sprints, each ending with a working demo you can test against real data. We use Entity Framework Core and SQL Server for all data persistence. Migration history feeds directly into IQ documentation.
4. Weeks 9-14: Integration and IQ/OQ testing. Installation qualification (IQ) and operational qualification (OQ) protocols run in your test environment. Every test script maps to the FRS. Deviations are documented and resolved before OQ closes. HITL checkpoint: your QA team signs off on OQ before any production deployment.
5. Weeks 13-20: Performance qualification (PQ) and user acceptance testing. Real users run real workflows against production-representative data. Every defect is tracked against the validation protocol. PQ sign-off is the formal release gate.
6. Weeks 20-24: Go-live and hypercare. Phased cutover with your legacy system running in parallel for the first two weeks. QServices engineering is on call for 30 days post-launch. Handoff includes source code, deployment runbooks, and a complete validation package: FRS, VMP, IQ/OQ/PQ protocols, and traceability matrix.

For more on how FDA guidance shapes our development process, see the FDA General Principles of Software Validation.

What this costs

Medical device .NET projects cost more than general custom software because validation documentation is real engineering work, not overhead. See our full .NET development cost guide for detailed breakdowns by project type.

For medical device manufacturers, realistic budget ranges:

• Single-system integration (ERP to QMS API): $50,000 to $100,000
• Post-market surveillance dashboard with validated data pipeline: $80,000 to $150,000
• Multi-system platform (ERP, QMS, PMS, regulatory reporting): $150,000 to $300,000

Drives cost up:

• Full IQ/OQ/PQ validation package with traceability matrix
• Multiple legacy system integrations (SAP, Oracle EBS, Veeva Vault): add $3,000 to $12,000 per integration
• Dual FDA and EU MDR compliance scope: add 15 to 25% to engineering estimates
• Third-party compliance review before regulatory submission: add $5,000 to $20,000

Keeps cost down:

• Clean API documentation from existing systems shortens integration discovery time
• Standard Azure App Service and SQL Server stack avoids custom infrastructure work
• Risk-tiered validation scope covering only high-risk functions, not the full application
• Starting with one product line before expanding across the portfolio

Three things medical device buyers usually get wrong

1. Treating validation as documentation written after development is complete. This is the most expensive mistake we see in this industry. Teams build the system, then write protocols to match what they built. FDA expects documentation to drive development, not follow it. When we quote a project, validation planning starts in week one. If a vendor does not include IQ/OQ/PQ in the project timeline, that work is out of scope and will appear as a change order later.

2. Assuming a QMS platform includes ERP integration out of the box. Veeva Vault and MasterControl are excellent products. They are not ERPs. The assumption that they will connect to SAP or Oracle EBS with minimal effort is responsible for more failed implementations than any other single factor we have seen. Each integration requires a custom adapter, a data mapping exercise, and its own validation protocol. Budget for each one separately from day one.

3. Skipping CI/CD because the validation team is skeptical of automated deployment. Some quality teams believe automated deployment is incompatible with validated systems. It is not. A well-designed CI/CD pipeline with controlled release gates is more auditable than a manual deployment process. We have helped regulatory teams map automated testing to their existing change control procedures. Skipping CI/CD does not make your system safer. It makes every future change slower and more expensive to validate.

Recent work with medical device clients

We do not currently have a public medical device case study. What we can show you is our .NET delivery record in other regulated industries where the same validation discipline, audit trail requirements, and integration complexity apply. QServices is a Microsoft Solutions Partner for Azure with 15 years of engineering delivery across FinTech, banking, and wealth management.

Our cross-border payment platform work required audit trails, transaction non-repudiation, and data integrity controls that directly parallel FDA 21 CFR Part 11 requirements. We cut settlement times from 3 to 5 days to under 24 hours and delivered a full reconciliation audit trail satisfying financial regulators.

To speak with Sahil Kataria or Rohit Dabra about our regulated-industry experience before scheduling a discovery call, contact us through our .NET development services page.

How long does .NET development take for a medical device manufacturer?

A single-system integration, such as connecting your ERP to your QMS with a validated API, takes 8 to 12 weeks including IQ/OQ documentation. A multi-system platform with post-market surveillance reporting and regulatory submission pipelines takes 16 to 24 weeks. The validation package is part of every timeline, not an add-on that extends it.